Note 9 - Share-based Compensation and Cash-based Incentive Compensation - Summary of Incentive Compensation Expense Under Share-based Payment Arrangements (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||||
|---|---|---|---|---|---|---|
Jun. 30, 2019 |
Jun. 30, 2018 |
Jun. 30, 2019 |
Jun. 30, 2018 |
|||
| Share-based compensation | $ 1,259 | $ 1,215 | $ 1,181 | $ 2,434 | ||
| Restricted Stock Units (RSUs) [Member] | ||||||
| Share-based compensation | [1] | 1,189 | 1,145 | 1,041 | 2,294 | |
| Restricted Stock [Member] | ||||||
| Share-based compensation | $ 70 | $ 70 | $ 140 | $ 140 | ||
| ||||||
| X | ||||||||||
- Definition Amount of noncash expense for share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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